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VRAM optimization + matrix multiplication discussion #1935

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VRAM optimization + matrix multiplication discussion #1935

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7 changes: 7 additions & 0 deletions ggml-cuda.cu
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Original file line number Diff line number Diff line change
Expand Up @@ -1476,6 +1476,7 @@ static cuda_buffer g_cuda_buffer_pool[GGML_CUDA_MAX_DEVICES][MAX_CUDA_BUFFERS];
static std::atomic_flag g_cuda_pool_lock = ATOMIC_FLAG_INIT;

static void * ggml_cuda_pool_malloc(size_t size, size_t * actual_size) {
static size_t total_size = 0;
scoped_spin_lock lock(g_cuda_pool_lock);
int id;
CUDA_CHECK(cudaGetDevice(&id));
Expand All @@ -1492,6 +1493,8 @@ static void * ggml_cuda_pool_malloc(size_t size, size_t * actual_size) {
}
void * ptr;
CUDA_CHECK(cudaMalloc((void **) &ptr, size));
total_size += size;
fprintf(stderr, "%s: size=%.2f, total_size=%.2f\n", __func__, size / 1024.0f / 1024.0f, total_size / 1024.0f / 1024.0f);
*actual_size = size;
return ptr;
}
Expand Down Expand Up @@ -1560,6 +1563,10 @@ void ggml_init_cublas() {
// CUBLAS_CHECK(cublasLoggerConfigure(1, 1, 0, nullptr));

initialized = true;

size_t actual_size;
void * ptr = ggml_cuda_pool_malloc(813*1024*1024, &actual_size);
ggml_cuda_pool_free(ptr, actual_size);
}
}

Expand Down